Spectroscopic evidence for a molecular structure in quartzNot Availabledoi:10.1007/BF00667245T. A. SidorovKluwer Academic Publishers-Plenum PublishersJournal of Applied Spectroscopy
The molecular dynamics with a first-principles interatomic potential is used to study the phase transition of quartz from the α to β phase. The phase transition, successfully reproduced at about 850 K, is shown to have a peculiar dynamical character in that, although the probability distribution...
They also indicate the generation of a higher-order structure on the other C-rich strand, which strictly depends on the G-tracts on the G strand and is not likely to be i-motif. We also show that Rif1BS have a potential to form multiple G4 structures on the G-rich strand, and in...
The SECCM probe consisted of a quartz theta pipette with a tip opening diameter of ∼200 nm as previously reported11. The nanopipette was filled with 0.1 M HCl electrolyte and two Ag/AgCl quasi-reference counter electrodes were used to electrically connect each of the pipette channels49...
Molecular dynamics simulations have been employed to investigate the hydration and dissolution of α-quartz (0001) surfaces in a liquid water environment. Our study indicates that the structure of the water layers near the surfaces is affected by the nature of the substrate surface and by temperatur...
Yet, the linkage pattern of the coordination polyhedra in the structure is such that it results in an orthorhombic, Pnc2, symmetry with 12 SiO2 per unit cell. Under ambient conditions the density of the orthorhombic phase is roughly 5% higher than that of hexagonal quartz. This orthorhombic ...
structure of PBP3 fromPseudomonas aeruginosa15as a model. PBP2:MreC complex crystals yielded diffraction data to 2.7 Å and harbored two 1:2 PBP2:MreC complexes in the asymmetric unit. Diffraction data were phased by using our structure of PBP2 fromH. pylorias a model in a molecular...
DefinitionMolecular sieve 13x is the sodium form of the Type X crystal structure with pore diameters of approximately 10 Å. It can adsorb all molecules that can be adsorbed by 3A, 4A, and 5A molecular sieve. Type 13X molecular sieve can also adsorb molecules such as aromatics and branched...
However, current approaches using quartz-crystal and microelectromechanical oscillators suffer from frequency drift. Recent advances in chip-scale atomic clocks, which probe the hyperfine transitions of evaporated alkali atoms, have led to devices that can overcome this issue, but their complex ...
asphaltene structure of the interface. Therefore, the electrical double-layer expansion43,44might be the symptom for vast content of crude oil surface active species (e.g. asphaltenes, resins) at the liquid–Liquid interface. A diffuse ionic stratum can be constructed due to adsorption of the ...